TASK 72-60-22-200-003 Starter Drive Gear - Examine, Inspection-003

DMC:V2500-A0-72-60-2201-00A-300A-C|Issue No:003.00|Issue Date:2017-08-01

Export Control

EAR Export Classification: Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3), except for the following Service Bulletins which are currently published as EAR Export Classification 9E991: SBE70-0992, SBE72-0483, SBE72-0580, SBE72-0588, SBE72-0640, SBE73-0209, SBE80-0024 and SBE80-0025.

Copyright

© IAE International Aero Engines AG (2001, 2014 - 2021) The information contained in this document is the property of © IAE International Aero Engines AG and may not be copied or used for any purpose other than that for which it is supplied without the express written authority of © IAE International Aero Engines AG. (This does not preclude use by engine and aircraft operators for normal instructional, maintenance or overhaul purposes.).

Applicability

All

Common Information

TASK 72-60-22-200-003 Starter Drive Gear - Examine, Inspection-003

Effectivity

FIG/ITEM

PART NO.

01-260

4P0006

General

This TASK gives the procedure for the inspection of the starter drive gear. For the other parts of the starter drive gear assembly, refer to TASK 72-60-22-200-000 (INSPECTION/CHECK-000).

Fig/item numbers in parentheses in the procedure agree with those used in the IPC.

The policy that is necessary for inspection is given in the SPM TASK 70-20-01-200-501.

All the parts must be cleaned before any part is examined. Refer to the SPM TASK 70-11-03-300-503.

All parts must be visually examined for damage, corrosion and wear. Any defects that are not identified in the procedure must be referred to IAE.

The procedure for those parts which must have a crack test is given in the SPM TASK 70-23-00-230-501. Do the test before the part is visually examined. Limits for cracks are given in the SUBTASK for each part.

Do not discard any part until you are sure there are no repairs available. Refer to the instructions in repair before a discarded part is used again or oversize parts are installed.

Parts which should be discarded can be held although no repair is available. The repair of a discarded part could be shown to be necessary at a later date.

All parts must be examined to make sure that all the repairs have been completed satisfactorily.

The practices and processes referred to in the procedure by the TASK/SUBTASK numbers are in the SPM.

References

Refer to the SPM for data on these items:

Definitions of Damage, SPM TASK 70-02-02-350-501

Record and Control of the Lives of Parts, SPM TASK 70-05-00-220-501

Inspection of Parts, SPM TASK 70-20-00-200-501.

Some data on these items is contained in this TASK. For more data on these items refer to the SPM:

Method of Testing for Crack Indications,

Chemical Processes,

Surface Protection.

Preliminary Requirements

Pre-Conditions

NONE

Support Equipment

NameManufacturerPart Number / IdentificationQuantityRemark
Demagnetizing unitLOCALDemagnetizing unit
Hardness testerLOCALHardness tester
Magnetizing unitLOCALMagnetizing unit
Workshop inspection equipmentLOCALWorkshop inspection equipment

Consumables, Materials and Expendables

NONE

Spares

NONE

Safety Requirements

NONE

Procedure

    1. SUBTASK 72-60-22-240-053 Do a Crack Test on the Starter Drive Gear (Magnetic)

    1. Clean the parts. Refer to the TASK 72-60-22-100-000 (CLEANING-000).

      2. Do the test for cracks on the parts that are given below.

        PART IDENT

        PROCEDURE

        CURRENT/INSPECT

        TASK/SUBTASK

        Starter drive gear

        TB

        700 Amp

        SUBTASK 70-24-01-240-011

        TB

        1700 Amp

        SUBTASK 70-24-01-240-011

        Coil

        7000 A/T

        SUBTASK 70-24-01-240-014

        1. Cracked

        1. Reject

    2. SUBTASK 72-60-22-220-060 Examine the Starter Drive Gear Gear Teeth, Location 1

    1. Refer to Figure.

      2. Nicks on the tip of tooth.

        1. Three for each tooth 0.032 in. (0.80 mm) long, 0.008 in. (0.20 mm) in depth, extended less than 0.016 in. (0.40 mm) onto face of tooth. The distance between nicks must be equal to, or larger than the length of the longest nick

        1. Accept

        2. More than Step

        1. Repair, VRS5127 TASK 72-60-22-300-014 (REPAIR-014).

      3. Damage on the engagement surface.

        1. Superficial damage

        1. Repair, VRS5127 TASK 72-60-22-300-014 (REPAIR-014).

      4. Chips, flakes or fretting

      1. Reject

      5. Wear of teeth

        1. Measure the dimension over the diametrically opposite 0.1969 in. (5.000 mm) diameter pins

          1. Between 4.6126 in. and 4.6054 in. (117.161 mm and 116.978 mm)

          1. Accept

          2. Less than 4.6035 in. (116.928 mm)

          1. Reject

      6. NOTE

        Do this check only if overheating or some other condition makes it necessary. A blue discoloration of the part is an indication of overheating.

        Hardness of teeth.

        1. Measure the hardness of teeth area at location 2

          1. Less than 56 HRC measured at different locations

          1. Reject

        2. Measure the hardness of gear area adjacent to teeth at location 3

          1. Less than 30 HRC measured at different locations

          1. Reject

    3. SUBTASK 72-60-22-220-061 Examine the Starter Drive Gear Rear Bearing Shoulder, Location 4

    1. Refer to Figure.

      2. Runout.

        1. In 0.001 in. (0.025 mm) in relation to surface A and B

        1. Accept

        2. More than Step

        1. Repair, VRS5131 TASK 72-60-22-300-018 (REPAIR-018).

    4. SUBTASK 72-60-22-220-062 Examine the Starter Drive Gear Rotating Ring Journal, Location 4020

    1. Refer to Figure.

      2. Diameter.

        1. Between 1.6535 in. and 1.6526 in. (42.000 mm and 41.975 mm)

        1. Accept

        2. Less than 1.6526 in. (41.975 mm)

        1. Repair, VRS5132 TASK 72-60-22-300-019 (REPAIR-019)

      3. Runout.

        1. In 0.002 in. (0.05 mm) in relation to surfaces A and B

        1. Accept

        2. More than Step

        1. Repair, VRS5132 TASK 72-60-22-300-019 (REPAIR-019)

    5. SUBTASK 72-60-22-220-063 Examine the Starter Drive Gear Spline, Location 5

    1. Refer to Figure.

      2. Spline teeth.

        1. Superficial damage

        1. Repair, VRS5127 TASK 72-60-22-300-014 (REPAIR-014)

      3. Chips, flakes or fretting

      1. Reject

      4. Wear of teeth.

        1. Measure the dimension between the diametrically opposite 0.0864 in. (2.194 mm) diameter pins

          1. Between 1.0789 in. and 1.0813 in. (27.403 mm and 27.465 mm)

          1. Accept

          2. More than 1.0833 in. (27.515 mm)

          1. Reject

    6. SUBTASK 72-60-22-220-064 Examine the Starter Drive Gear Rear and Front Bearing Journals, Location 4019 and 4017

    1. Refer to Figure.

      2. Damage on the surface.

        1. Scratches not more than 0.008 in. (0.20 mm) in depth

        1. Repair, VRS5127 TASK 72-60-22-300-014 (REPAIR-014).

        2. Scratches more than 0.008 in. (0.20 mm) in depth

        1. Repair, VRS5128 TASK 72-60-22-300-015 (REPAIR-015), Repair, VRS5129 TASK 72-60-22-300-016 (REPAIR-016).

    7. SUBTASK 72-60-22-220-065 Examine the Starter Drive Gear Rear Bearing Journal, Location 4019

    1. Refer to Figure.

      2. Diameter.

        1. Between 1.7344 in. and 1.7340 in. (44.054 mm and 44.043 mm)

        1. Accept

        2. Less than 1.7340 in. (44.043 mm)

        1. Repair, VRS5128 TASK 72-60-22-300-015 (REPAIR-015)

      3. Runout.

        1. In 0.001 in. (0.025 mm) in relation to surfaces A and B

        1. Accept

        2. More than Step

        1. Repair, VRS5128 TASK 72-60-22-300-015 (REPAIR-015)

    8. SUBTASK 72-60-22-220-066 Examine the Starter Drive Gear Front Bearing Shoulder, Location 6

    1. Refer to Figure.

      2. Runout.

        1. In 0.001 in. (0.025 mm) in relation to surfaces A and B

        1. Accept

        2. More than Step

        1. Repair, VRS5130 TASK 72-60-22-300-017 (REPAIR-017)

    9. SUBTASK 72-60-22-220-067 Examine the Starter Drive Gear Front Bearing Journal, Location 4017

    1. Refer to Figure.

      2. Diameter.

        1. Between 1.7734 in. and 1.7730 in. (45.045 mm and 45.034 mm)

        1. Accept

        2. Less than 1.7730 in. (45.043 mm)

        1. Repair, VRS5129 TASK 72-60-22-300-016 (REPAIR-016).

      3. Runout.

        1. In 0.001 in. (0.025 mm) in relation to surfaces A and B

        1. Accept

        2. More than Step

        1. Repair, VRS5129 TASK 72-60-22-300-016 (REPAIR-016).

    10. Figure: Locations - Starter Drive Gear

    Locations - Starter Drive Gear

Requirements After Job Completion

Follow-On Conditions

NONE
Change Type:

Revised the procedure to update repair references. (17VC041)

Manufacturer Code:LOCAL
Enterprise Name:LOCALLY SUPPLIED
Manufacturer Code:LOCAL
Tool Number:Demagnetizing unit
Tool Name:Demagnetizing unit
Link not Found
Manufacturer Code:LOCAL
Tool Number:Magnetizing unit
Tool Name:Magnetizing unit
Manufacturer Code:LOCAL
Tool Number:Workshop inspection equipment
Tool Name:Workshop inspection equipment